code: def _parse_email_file(filename):
      """Parse email file text for email body and subject."""
      with epath.Path(filename).open() as f:
          email_body = ""
          for line in f:
              if line == "\n":
                  break
              email_body += line
          line = next(f)
          subject = ""
          for line in f:
              if line == "\n":
                  break
              subject += line
      return email_body, subject
  
file_path: datasets/tensorflow_datasets/datasets/aeslc/aeslc_dataset_builder.py
imports: import os
  from etils import epath
  from tensorflow_datasets.core.utils.lazy_imports_utils import tensorflow
  import tensorflow_datasets.public_api
label_desc: Use image node_id 1 for calling a global function with example usage: _parse_email_file(filename) and returns: email_body,  subject